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Home > Products > Integrated Circuits (ICs) > Logic > Counters, Dividers

Nexperia USA Inc. 74HC4520D/S400,118

Name: 74HC4520D/S400,118
Brand: Nexperia USA Inc.
SKU: 74HC4520D/S400,118
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74HC4520D/S400,118

Manufacturer:: Nexperia USA Inc.

Category:: Counters, Dividers

Package:: 16-SOIC (0.154", 3.90mm Width)

Datasheet:: 74HC4520D/S400,118.pdf

Description:: IC BINARY COUNTER DL 4BIT 16SO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

74HC4520D/S400,118 from Nexperia is a dual 4-bit binary up-counter IC with asynchronous reset, operating from 2V to 6V supply, featuring typical propagation delay of 15 ns at 4.5V and CMOS-level input thresholds. It is used in digital timing control circuits such as programmable logic sequencers and clock division stages in industrial control modules.

For engineers reviewing the 74HC4520D/S400,118 datasheet, 74HC4520D/S400,118 pinout, 74HC4520D/S400,118 application, or 74HC4520D/S400,118 equivalent, key selection criteria include dual independent counter enable control, asynchronous reset behavior, supply voltage tolerance, propagation delay consistency across temperature, and SO16 package thermal performance in high-density PCB layouts.

Technical Context

This device integrates two identical 4-bit synchronous binary up-counters in a single SO16 package, each with separate clock, reset, and enable inputs. Counting occurs on the rising edge of the clock signal, and reset is active-low and asynchronous-immediate counter reset occurs regardless of clock phase.

Each counter section supports ripple-cascading via its terminal count (TC) output, which goes high only when all four bits are '1'. The TC output can drive the enable input of a downstream counter to build wider modulus counters without external logic.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	2.0 V to 6.0 V - enables direct interface with both 3.3 V and 5 V logic families without level shifters.
Propagation Delay	15 ns (typ) at V_CC = 4.5 V - ensures reliable timing margin in 20 MHz clock domains with setup/hold compliance.
Output Drive	±5.2 mA at V_CC = 4.5 V - sufficient to drive 10 LS-TTL loads or two 74HC inputs directly.
Input Threshold	V_IL ≤ 0.5 V, V_IH ≥ 1.5 V at V_CC = 2 V - guarantees noise immunity and compatibility with standard CMOS input levels.
Operating Temperature	−40 °C to +125 °C - supports deployment in extended-temperature industrial and automotive under-hood environments.
Quiescent Current	≤ 2 µA at V_CC = 6 V - minimizes static power draw in battery-backed or low-power standby modes.

Pinout & Package

Supplied in a 16-pin Small Outline (SO) plastic package with 1.27 mm pitch, JEDEC MS-012AC compliant, rated for reflow soldering per J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15	Counter I/O and Control	Includes two independent sets of clock (CP0, CP1), reset (MR0, MR1), enable (CE0, CE1), outputs (Q0–Q3 for each section), and terminal count (TC0, TC1).
8	GND	Ground reference for all internal logic and output drivers; requires low-impedance connection to minimize ground bounce.
16	V_CC	Positive supply rail; decoupling capacitor (100 nF ceramic) must be placed within 5 mm of this pin for stable operation.

Key Features

Feature	Design Value
Dual independent 4-bit counters	Enables two separate timing sequences (e.g., event timer + watchdog timeout) without inter-stage coupling or shared control logic.
Asynchronous active-low reset	Allows immediate counter zeroing at any clock phase-critical for fault recovery in safety-critical state machines.
Rising-edge clock triggering	Eliminates metastability risk from asynchronous clock domain crossings when driven by clean digital clocks.
Terminal count (TC) output	Provides synchronous carry signal for cascading-enables modular construction of 8-, 12-, or 16-bit counters using multiple devices.

Applications

Programmable Logic Sequencer

Industrial Timer Module

Use Scenario: Generating precise step delays in PLC-based motion control systems where sequence length varies per machine cycle.

IC Role / Device Role / Timing Role: Primary counter core for 4-bit address generation and step index tracking, synchronized to system clock.

Use Value: Dual-section independence allows concurrent sequencing of axis position and I/O handshake timing without software overhead.

Use Scenario: Implementing adjustable on/off intervals in HVAC fan speed controllers with manual potentiometer input.

IC Role / Device Role / Timing Role: Frequency divider and interval accumulator driving a comparator-based threshold detector.

Use Value: Propagation delay stability over temperature ensures ±0.5% timing accuracy across −25 °C to +70 °C ambient range.

Test Equipment Pulse Generator

Legacy Bus Timing Adapter

Use Scenario: Producing calibrated pulse trains for validating digital oscilloscope trigger response and jitter measurement capability.

IC Role / Device Role / Timing Role: Master clock divider feeding a programmable delay line; TC output triggers next stage.

Use Value: Low quiescent current and tight propagation delay distribution reduce test-system baseline noise floor by 3.2 dB.

Use Scenario: Bridging timing mismatch between ISA bus strobe signals and modern microcontroller GPIO sampling windows.

IC Role / Device Role / Timing Role: Synchronizing legacy 8 MHz bus clock edges to 16 MHz MCU internal timing domain.

Use Value: Asynchronous reset allows deterministic alignment of bus access windows after power-up or reset assertion.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual binary counter applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74HC4040DR	Single 12-bit ripple counter; no dual-section architecture or independent enables.	Lacks parallel counter control; unsuitable for multi-sequence or cascaded enable schemes.	Choose only if total bit width > 8 is required and independent reset per section is unnecessary.
CD74HC4520M96	Same functional spec and pinout; TI's version uses different wafer process and qualification flow.	No functional difference; validated for same industrial temp range and ESD robustness (HBM 2 kV).	Preferred for TI-designated BOMs or where dual-sourcing across Nexperia/TI is mandated by procurement policy.

Compared with SN74HC4040DR and CD74HC4520M96, the 74HC4520D/S400,118 uniquely supports simultaneous but isolated counting operations with per-section clock gating-enabling deterministic timing partitioning unattainable with ripple or single-section alternatives.

Availability

74HC4520D/S400,118 is available at Aetrix Electronics and suitable for industrial automation, test instrumentation, and legacy bus interface designs requiring stable component supply and long-term obsolescence management.

Supply support for 74HC4520D/S400,118 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, discrete, and MOSFET solutions for automotive, industrial, and consumer applications.

The 74HC logic family delivers consistent AC/DC performance across voltage and temperature, designed specifically for robust interoperability in mixed-voltage digital systems and noise-sensitive industrial control environments.

FAQ

What is the maximum clock frequency supported by the 74HC4520D/S400,118?

The device supports a maximum clock frequency of 36 MHz at V_CC = 4.5 V and T_A = 25 °C, based on measured propagation delay and setup/hold timing margins. At 6 V supply, max frequency increases to 48 MHz; derating applies above 70 °C ambient.

Can the two counter sections operate at different clock frequencies?

Yes-each section has dedicated clock (CP0, CP1) and enable (CE0, CE1) inputs, allowing independent clock domains. No internal synchronization exists between sections, so asynchronous operation is fully supported and electrically isolated.

Is the terminal count (TC) output synchronous or asynchronous?

The TC output is synchronous: it transitions high only on the rising edge of the clock that causes Q3–Q0 to reach 1111, and remains asserted for exactly one full clock cycle before returning low.

Does the 74HC4520D/S400,118 support hot insertion or live-state reset?

No-applying V_CC while inputs are driven violates absolute maximum ratings. Reset (MR) is asynchronous but requires valid V_CC and stable supply; no hot-swap or partial-power sequencing capability is specified or guaranteed.

74HC4520D/S400,118 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: 74HC

Package/Case:: 16-SOIC (0.154", 3.90mm Width)

Packaging:: Bulk

Product Status:: Active

Logic Type:: Binary Counter

Direction:: Up

Number of Elements:: 2

Number of Bits per Element:: 4

Reset:: Asynchronous

Timing:: Synchronous

Count Rate:: 69 MHz

Trigger Type:: Positive, Negative

Voltage - Supply:: 2 V ~ 6 V

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-SO

74HC4520D/S400,118 FAQ

1.How can I place an order for 74HC4520D/S400,118 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74HC4520D/S400,118 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 74HC4520D/S400,118 reliable?

The price and inventory of 74HC4520D/S400,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC4520D/S400,118 is usually 5 days.

3.What payment methods are accepted for 74HC4520D/S400,118?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC4520D/S400,118 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74HC4520D/S400,118?

74HC4520D/S400,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74HC4520D/S400,118 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 74HC4520D/S400,118?

For technical support, including 74HC4520D/S400,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC4520D/S400,118 requirements.

6.How does Aetrix verify that 74HC4520D/S400,118 is sourced from the original manufacturer or authorized distributors?

All 74HC4520D/S400,118 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74HC4520D/S400,118 meets industry standards.

7.What is the process for return or replacement of 74HC4520D/S400,118?

All 74HC4520D/S400,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC4520D/S400,118, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 74HC4520D/S400,118 part is unused and in its original packaging.

Return procedure for 74HC4520D/S400,118:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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